Tag: biology

Questions Related to biology

Caruncle is derived from

biology the flower dicot seed structure of monocot and dicot seed the seed

  1. Peduncle

  2. Cotyledon

  3. Outer integument

  4. Inner integument

Show answer
Correct Option: C
Explanation:
In plants,Caruncle is an outgrowth near the hilum on the seeds of some plants of family Euphorbiaceae (like Hevea ). Outer integument is the outermost part of the ovule . During development of the ovule, the outer integument differentiates into different layers of seed coat. Caruncle is also derived from outer integument.
So, the correct option is 'Outer integument'

Pea nut or ground nut oil is obtained from

biology the flower dicot seed structure of monocot and dicot seed the seed

  1. Lathyrus odoratus

  2. Pisum sativum

  3. Arachis hypogea

  4. Brassica juncea

Show answer
Correct Option: C
Explanation:

Peanut (Arachis hypogaea) oil is the refined fixed oil obtained from the seed kernels of Arachis hypogaea. Hydrogenated peanut oil, peanut acid, and peanut glycerides are all derived from peanut oil. It is light yellow-colored oil and extremely stable, with nourishing and protective properties.

In which of the following, multiciliated/multiflagelated
anthropoids are present

biology seed dicot seed structure of monocot and dicot seed the seed

  1. Riccia and Funaria

  2. Pteris and Cycas

  3. Riccia and Cycas

  4. Marchantia and Riccia

Show answer
Correct Option: B
Explanation:

In pt eris antheridum is having (about 32) multiflagellated, coiled (2 - 3 coils) anthropoids or spermatozoids.

X is scar on the seed through which the developing seeds were attached to the fruit; above the X is a small pore called Y.
Identify X and Y and select the correct option.

biology seed dicot seed structure of monocot and dicot seed the seed

  1. X - Micropyle, Y - Hilum

  2. X - Hilum, Y - Micropyle

  3. X - Testa, Y - Tegmen

  4. X - Chalaza, Y - Micropyle

Show answer
Correct Option: B
Explanation:

X - Hilum - it is the point of attachmnet of the ovule to its stalk or the funicle

Y - Micropyle, the pore or the opening of the ovule, where the integuments do not cover the ovule. It is an opening for the entry of the pollen tube during fertilization.
So, the correct answer is (b).

In dicots the most common pollen tetrad is?

biology seed dicot seed structure of monocot and dicot seed the seed

  1. Isobilateral

  2. Tetrahedral

  3. Linear

  4. Decussate

Show answer
Correct Option: B

A dicot plant lacking cotyledons is

biology seed dicot seed structure of monocot and dicot seed the seed

  1. Cuscuta

  2. Santalum

  3. Lodoicea

  4. None of the above

Show answer
Correct Option: A
Explanation:

Cuscuta is a plant whose embryos lack cotyledons. It is called dicot plant because the stem of cuscuta has as dicot structure. 

 In Groundnut, oil is stored in

biology seed dicot seed structure of monocot and dicot seed the seed

  1. Embryo axis

  2. Endosperm

  3. Cotyledons

  4. None of the above

Show answer
Correct Option: C
Explanation:

In groundnut, oil is stored in the seeds cotyledons.  It is a legume plant.  Each seed of groundnut has 2 cotyledons. 

Select the correct option. 

biology skeleton and movements introduction to locomotion skeleton and joints movement in animals

  1. Locomotion is shown by multi cellular organisms

  2. Paramecium uses tentacles for locomotion

  3. Hydra uses cilia for locomotion

  4. Kangroo cannot walk backward

Show answer
Correct Option: D
Explanation:

  • Locomotion is a feature exhibited by both unicellular and multicellular organisms. 
  • Paramecium uses cilia for its locomotion and Hydra uses somersaulting or gliding movement for its locomotion. 
  • Kangaroos can't walk backward. An unusual feature of the kangaroo is that it cannot walk backwards. This is because of its unusually shaped hind legs and bulky tail which can grow up to four feet long.

So the correct option is 'Kangaroo cannot walk backward'.

What does the word pseuopod mean ?

biology skeleton and joints introduction to locomotion movement in animals skeleton and movements

  1. Hidden arm

  2. False foot

  3. Soft bodied

  4. Multi limbed

Show answer
Correct Option: A

Which of the following statements is not true?

biology skeleton and joints introduction to locomotion movement in animals skeleton and movements

  1. The cartilage is not as hard as bones.

  2. A snake moves by making loops.

  3. All animals show exactly similar movements.

  4. Snails move with the help of their muscular feet.

Show answer
Correct Option: C
Explanation:

All animals exhibit different patterns of movements. The movements differ with differences in the types of joints present in the animals. Example: In birds, the forelimbs are modified to result in wings, which leads to flying movement. In case of kangaroos, the hind limbs are modified such that they contain flexible muscles resulting in their jumping movement. In humans, the legs are modified so that they walk with two limbs only, as opposed by other vertebral mammals like dogs, cats etc. which have 4 limbs.

Hence the statement, 'all animals show exactly same movements' is false.